diff --git a/desktop/src/StartupUpdateGate.tsx b/desktop/src/StartupUpdateGate.tsx
index 7fd36b1..615ca24 100644
--- a/desktop/src/StartupUpdateGate.tsx
+++ b/desktop/src/StartupUpdateGate.tsx
@@ -5,6 +5,8 @@ import {
   type DesktopUpdateProgress,
 } from './bridge/updater';
 import { scheduleMainWindowTitleSync } from './setMainWindowTitle';
+import { PlatformBrandIcon, type PlatformBrandIconId } from '@frontend/components/icons/PlatformBrandIcons';
+import { isMacDesktop, isWindowsDesktop } from '@frontend/utils/platform';
 import '@frontend/App.css';
 
 const PHASE_LABEL: Record<DesktopUpdatePhase, string> = {
@@ -35,9 +37,20 @@ function StartupUpdateSplash({ progress }: { progress: DesktopUpdateProgress | n
       ? 'desktop-update-progress--active'
       : '';
 
+  const platformBrand: PlatformBrandIconId | null = isMacDesktop()
+    ? 'mac'
+    : isWindowsDesktop()
+      ? 'windows'
+      : null;
+
   return (
     <div className="desktop-startup-update">
       <div className="desktop-startup-update-card">
+        {platformBrand && (
+          <div className="desktop-update-platform-brand desktop-update-platform-brand--startup">
+            <PlatformBrandIcon platform={platformBrand} />
+          </div>
+        )}
         <h1 className="desktop-startup-update-title">GoldenChart</h1>
         <p className="desktop-startup-update-sub">
           {progress?.currentVersion ? `현재 v${progress.currentVersion}` : '시작 중…'}
diff --git a/frontend/src/App.css b/frontend/src/App.css
index 097b768..89ca154 100644
--- a/frontend/src/App.css
+++ b/frontend/src/App.css
@@ -13429,6 +13429,14 @@ html.theme-light .tam-disclaimer     { color: #90a4ae; }
   margin: 8px 0 0; font-size: 12px; color: #4ade80; line-height: 1.45;
 }
 .desktop-update-modal-body { padding: 4px 2px 0; }
+.desktop-update-platform-brand {
+  display: flex;
+  justify-content: center;
+  margin-bottom: 12px;
+}
+.desktop-update-platform-brand--startup {
+  margin-bottom: 10px;
+}
 .desktop-update-version {
   margin: 0 0 12px; font-size: 13px; color: var(--text2);
 }
@@ -13598,7 +13606,29 @@ html.theme-light .tam-disclaimer     { color: #90a4ae; }
   background: var(--bg2); border: 1px solid var(--border);
 }
 .app-download-pc-card--empty { opacity: 0.75; }
-.app-download-pc-icon { font-size: 28px; flex-shrink: 0; width: 36px; text-align: center; }
+.app-download-pc-icon {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  flex-shrink: 0;
+  width: 40px;
+  height: 40px;
+  border-radius: 10px;
+  box-sizing: border-box;
+}
+.app-download-pc-icon--mac {
+  background: #1d1d1f;
+  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
+}
+.app-download-pc-icon--windows {
+  background: #0078d4;
+  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.12);
+}
+.app-download-pc-icon--android {
+  font-size: 24px;
+  background: var(--bg3);
+  border: 1px solid var(--border);
+}
 .app-download-pc-body { flex: 1; min-width: 0; }
 .app-download-pc-body strong { display: block; font-size: 14px; margin-bottom: 4px; }
 .app-download-pc-btn {
diff --git a/frontend/src/components/AppDownloadModal.tsx b/frontend/src/components/AppDownloadModal.tsx
index f1c93cf..cd285c6 100644
--- a/frontend/src/components/AppDownloadModal.tsx
+++ b/frontend/src/components/AppDownloadModal.tsx
@@ -4,6 +4,7 @@
 import React, { useCallback, useEffect, useMemo, useRef, useState } from 'react';
 import QRCode from 'qrcode';
 import DraggableModalFrame from './DraggableModalFrame';
+import { PlatformBrandIcon } from './icons/PlatformBrandIcons';
 import {
   loadDesktopAppBuildReadiness,
   loadDesktopAppBuildStatus,
@@ -161,17 +162,18 @@ const PlatformCard: React.FC<{
   mobile?: MobileAppReleaseInfoDto | null;
 }> = ({ platform, release, mobile }) => {
   const configs = {
-    mac: { label: 'macOS (Apple Silicon · Intel)', icon: '🍎', ext: '.dmg', isLink: false },
-    windows: { label: 'Windows (64-bit)', icon: '🪟', ext: '.exe', isLink: false },
-    android: { label: 'Android (패드 · 폰 · 별도 버전)', icon: '🤖', ext: '.apk', isLink: false },
+    mac: { label: 'macOS (Apple Silicon · Intel)', ext: '.dmg', isLink: false },
+    windows: { label: 'Windows (64-bit)', ext: '.exe', isLink: false },
+    android: { label: 'Android (패드 · 폰 · 별도 버전)', ext: '.apk', isLink: false },
   } as const;
-  const { label, icon, ext } = configs[platform];
+  const { label, ext } = configs[platform];
+  const brandIcon = <PlatformBrandIcon platform={platform} />;
 
   if (platform === 'android') {
     if (!mobile?.available || !mobile.downloadUrl) {
       return (
         <div className="app-download-pc-card app-download-pc-card--empty">
-          <div className="app-download-pc-icon" aria-hidden>{icon}</div>
+          {brandIcon}
           <div>
             <strong>{label}</strong>
             <p className="app-download-muted">설치 파일 준비 중 ({ext})</p>
@@ -181,7 +183,7 @@ const PlatformCard: React.FC<{
     }
     return (
       <div className="app-download-pc-card">
-        <div className="app-download-pc-icon" aria-hidden>{icon}</div>
+        {brandIcon}
         <div className="app-download-pc-body">
           <strong>{label}</strong>
           <p className="app-download-meta">
@@ -207,7 +209,7 @@ const PlatformCard: React.FC<{
   if (!release?.available || !release.downloadUrl) {
     return (
       <div className="app-download-pc-card app-download-pc-card--empty">
-        <div className="app-download-pc-icon" aria-hidden>{icon}</div>
+        {brandIcon}
         <div>
           <strong>{label}</strong>
           <p className="app-download-muted">설치 파일 준비 중 ({ext})</p>
@@ -218,7 +220,7 @@ const PlatformCard: React.FC<{
 
   return (
     <div className="app-download-pc-card">
-      <div className="app-download-pc-icon" aria-hidden>{icon}</div>
+      {brandIcon}
       <div className="app-download-pc-body">
         <strong>{label}</strong>
         <p className="app-download-meta">
diff --git a/frontend/src/components/DesktopUpdateModal.tsx b/frontend/src/components/DesktopUpdateModal.tsx
index 7ba0bfa..b93e633 100644
--- a/frontend/src/components/DesktopUpdateModal.tsx
+++ b/frontend/src/components/DesktopUpdateModal.tsx
@@ -10,6 +10,7 @@ import {
   type DesktopUpdateProgress,
 } from '../utils/desktopBridge';
 import { isMacDesktop, isWindowsDesktop } from '../utils/platform';
+import { PlatformBrandIcon, type PlatformBrandIconId } from './icons/PlatformBrandIcons';
 
 interface Props {
   open: boolean;
@@ -84,6 +85,12 @@ const DesktopUpdateModal: React.FC<Props> = ({ open, onClose, autoStart = true }
     ? 100
     : progress?.downloadPercent;
 
+  const platformBrand: PlatformBrandIconId | null = isMacDesktop()
+    ? 'mac'
+    : isWindowsDesktop()
+      ? 'windows'
+      : null;
+
   return (
     <DraggableModalFrame
       title="PC 프로그램 업데이트"
@@ -93,6 +100,11 @@ const DesktopUpdateModal: React.FC<Props> = ({ open, onClose, autoStart = true }
       dialogClassName="sp-modal desktop-update-modal"
     >
       <div className="desktop-update-modal-body">
+        {platformBrand && (
+          <div className="desktop-update-platform-brand">
+            <PlatformBrandIcon platform={platformBrand} />
+          </div>
+        )}
         <p className="desktop-update-version">
           현재 버전 <strong>v{progress?.currentVersion ?? appVersion}</strong>
           {progress?.newVersion && progress.newVersion !== progress.currentVersion && (
diff --git a/frontend/src/components/icons/PlatformBrandIcons.tsx b/frontend/src/components/icons/PlatformBrandIcons.tsx
new file mode 100644
index 0000000..146b8c2
--- /dev/null
+++ b/frontend/src/components/icons/PlatformBrandIcons.tsx
@@ -0,0 +1,64 @@
+import React from 'react';
+
+/** Apple 실루엣 로고 — 흰색 (다크 배경용) */
+export const AppleLogoWhite: React.FC<{ size?: number; className?: string }> = ({
+  size = 22,
+  className,
+}) => (
+  <svg
+    width={size}
+    height={size}
+    viewBox="0 0 24 24"
+    fill="#ffffff"
+    className={className}
+    aria-hidden
+  >
+    <path d="M17.05 20.28c-.98.95-2.05.88-3.08.4-1.09-.5-2.08-.48-3.24 0-1.44.62-2.2.44-3.06-.4C2.79 15.25 3.51 7.59 9.05 7.31c1.35.07 2.29.74 3.08.8 1.18-.24 2.31-.93 3.57-.84 1.51.12 2.65.72 3.4 1.8-3.12 1.87-2.38 5.98.48 7.13-.57 1.5-1.31 2.99-2.54 4.09l.01-.01zM12.03 7.25c-.15-2.23 1.66-4.07 3.74-4.25.29 2.58-2.34 4.5-3.74 4.25z" />
+  </svg>
+);
+
+/** Microsoft Windows 4-pane 로고 */
+export const WindowsLogo: React.FC<{ size?: number; className?: string }> = ({
+  size = 22,
+  className,
+}) => (
+  <svg
+    width={size}
+    height={size}
+    viewBox="0 0 24 24"
+    className={className}
+    aria-hidden
+  >
+    <path fill="#f25022" d="M3 3h8.5v8.5H3V3z" />
+    <path fill="#7fba00" d="M12.5 3H21v8.5h-8.5V3z" />
+    <path fill="#00a4ef" d="M3 12.5h8.5V21H3v-8.5z" />
+    <path fill="#ffb900" d="M12.5 12.5H21V21h-8.5v-8.5z" />
+  </svg>
+);
+
+export type PlatformBrandIconId = 'mac' | 'windows' | 'android';
+
+export const PlatformBrandIcon: React.FC<{
+  platform: PlatformBrandIconId;
+  className?: string;
+}> = ({ platform, className }) => {
+  if (platform === 'mac') {
+    return (
+      <span className={`app-download-pc-icon app-download-pc-icon--mac${className ? ` ${className}` : ''}`}>
+        <AppleLogoWhite size={22} />
+      </span>
+    );
+  }
+  if (platform === 'windows') {
+    return (
+      <span className={`app-download-pc-icon app-download-pc-icon--windows${className ? ` ${className}` : ''}`}>
+        <WindowsLogo size={22} />
+      </span>
+    );
+  }
+  return (
+    <span className={`app-download-pc-icon app-download-pc-icon--android${className ? ` ${className}` : ''}`} aria-hidden>
+      🤖
+    </span>
+  );
+};